increase TUSB_VERSION_ to 0.8.0

src/tusb_option.h

@@ -28,7 +28,7 @@
 #define _TUSB_OPTION_H_
 
 #define TUSB_VERSION_MAJOR     0
-#define TUSB_VERSION_MINOR     7
+#define TUSB_VERSION_MINOR     8
 #define TUSB_VERSION_REVISION  0
 #define TUSB_VERSION_STRING    TU_STRING(TUSB_VERSION_MAJOR) "." TU_STRING(TUSB_VERSION_MINOR) "." TU_STRING(TUSB_VERSION_REVISION)